Symmetricom 098-00071-000, Руководство пользователя

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Using the Symmetricom Serial Interface Protocol
6. Symmetricom Serial Interface Protocol
This appendix provides information on communicating with the 8200 through the serial port. It
includes output examples and a description of commands.
Important! Use Developer’s Kit (Symmetricom P/N 054-00269-000) to connect unit to RS232 port of
PC.
Using the Symmetricom Serial Interface Protocol
The Symmetricom Serial Interface Protocol (SSIP) permits external communication with the 8200
through the serial port connector J1 when the unit is connected to a host PC. All "developer-mode"
commands are a single ASCII letter and require no termination. Of the eight RUN MODE commands,
three require the host to supply data.
Host Terminal Emulator Setup
Set up the comm port of the PC with the following configuration:
n
Data rate (baud or B.P.S. - baud rate) of the 8200 is 57.6K
n
No parity
n
8 data bits
n
1 stop bit
n
No local echo (unit echoes)
n
No hardware or software flow control
Note : The 8200's UART connections are based on 5 Vdc logic levels. RS232 Adapter (Symmetricom
p/n 054-00269-000) required to connect 8200 to PC.
Data Format
Run Mode Data Format (Customer Mode)
8200 outputs are all decimal data as “ASCII Coded Hex” except for echoed characters. Do not con-
vert data to decimal when transmitting to the 8200. All data are sent to the 8200 and received back as
“ASCII Coded Hex”. The following example shows how data are encoded.
Note: Flow control is not permitted in “Run Mode”.
Data sent to the 8200 in run mode should not be encoded.
The following is an example of output from the 8200 after power is applied to the unit.
Example
X 7 2 by Symmetricom, Inc., Copyright 2004
SDCP Version 4.24 of 4/2004; Loader Version 2
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